Well just recently my video card gave out and found out the batteries, I'm guessing that's what they were, on the video card were starting to burn out so I'm using onboard. Before I took the video card out the screen was flickering and the video drivers started failing and what not... With the on board I'm getting just flickering on and off of my t.v. which I'm using as a monitor. Any ideas? I'm connected using a vga cable and I've never had this problem before.